Lead sleeve expanding device



May 1, 1956 L. J. COOK LEAD SLEEVE EXPANDING DEVICE Filed June 1, 1955 m Q E. M R. Y V x Ev x, SS. f ....if/ lf2 United States Patent O 2,143,831 LEAD sLEEvEYEXANDI'NGDEvIcE Leon J. Cook, Monticello, Ill.

Application June 1, 1953, Serial No. 358,695

4 claims. (ci. 21a-'19) .This invention relates to a lead sleeve expanding device.

The invention is more particularly concerned with a device for expanding a lead sleeve within an opening in a wall for the retention within said opening of an internally threaded member for the reception of a bolt and` wherein said member provides the expanding means per se in the device.

A primary object of the invention is to provide a device or tool for expanding a lead sleeve disposed in surrounding relation to an internally threaded nut member adapted to be securely positioned within an opening in a wall and wherein said member is provided with a frusta-conical sleeve expanding peripheral surface and wherein said device includes means for temporarily retaining said member and co-operating means for driving said sleeve over the expanding peripheral surface of said member.

Other objects and advantages of the invention will become apparent in the course of the following detailed description, taken in connection with the accompanying drawing, wherein- Fig. 1 is a side elevational view of the device, less the lead sleeve and the sleeve expanding member.

Fig. 2 is an axial sectional view with the lead sleeve and sleeve expanding member omitted.

Fig. 3 is a sectional view transversely of Fig. 2, showing the driving member retracted in readiness for a hammer blow and showing the expanding nut member and lead sleeve in position for expansion of the latter about the former.

Fig. 4 is a sectional View similar to Fig. 3 but showing the driving member in protracted position with the lead sleeve expanded about the expanding nut member.

Fig. 5 is a bottom plan view of the device illustrated in Fig. 2.

Fig. 6 is a horizontal sectional view in the plane of line 6 6 on Fig. 3.

Fig. 7 is a horizontal sectional view in the plane of line 7-7 on Fig. 3.

Fig. 8 is a horizontal sectional view in the plane of line 8-8 on Fig. 4.

Fig. 9 is a perspective view of the driving member.

Referring now in detail to the drawing, it is to be rst observed that the expanding device or tool is shown in connection with the nut 10 which is to be rigidly retained within an opening in a wall through friction of a lead sleeve 11 interposed between the nut 10 and the rough surface of the said wall opening.

The nut 10 which is to be anchored in the wall includes a cylindrical portion 12 which is internally threaded as shown and a frusto-conical end portion 13 for a purpose later to appear.

The tool proper comprises a cylindrical casing 14 in which is reciprocably mounted a driving member 15 which, as is more clearly shown in Fig. 9, includes a bifurcatcd cylindrical portion 16 having a free end and having a reduced cylindrical extension 17 on the opposite end and the inner end wall of the casing 14.

The bifurcation in member 15 provides a slot 19 which opens through the free end of portion 16 as well as the cylindrical side wall thereof.A

Means are provided for retaining the driving member 15 in position within casing 14 as well as retaining the sleeve expanding member in iixed position during the expanding stroke of the driving member.

Such means comprises a generally T-shaped member including a head portion 20 which is rectangular in cross section and a cylindrical stern 21 extending through the cylindrical portion 17 of the driving member. The head portion 20 has its opposite ends seated in recesses 22 in the wall of casing 14 and secured therein by stud bolts 23.

The rectangular head portion 20 is disposed within the slot 19 in the driving member portion 16.

A disk member 24 is threadedly engaged within the free end of portion 16 of the driving member to prevent collapse thereof under hammer impact and a hammer engageable cupped plate 25 is threaded onto the end of portion 16 immediately outwardly of and in engagement with disk member 24, a set screw 26 extending through the margin of plate 25 and engaging portion 16 to restrain unthreading of the plate.

The free end of the cylindrical stem 21 is reduced and threaded as indicated at 27.

In use of the device as above described, the combined bolt retaining and lead sleeve expanding nut 10 has its internally threaded cylindrical portion 12 threaded onto the threaded free end 27 of the stem 21 and since the stem is rigid with casing 14 no relative movement between the casing and expanding nut can take place. At this point it is to be observed that the lead sleeve 11 is positioned on the end of stem 21 and into contact with the free end of the driving nut prior to threading member 10 into position and it is to be further observed that the outer surface of the cylindrical portion 12 of nut 10 is ush with the outer surface of stem 21.

The device is in fact shown in Fig. 3 in readiness for operation and which consists in introducing the nut 10 and sleeve 11 into a prepared opening in a wall with the base wall of casing 14 engaged with the outer face of the wall.

The operator then subjects the plate 25 to sharp hammer blows which results in inward movement of the driving member 15, which as indicated in Fig. 4 results in movement of the lead sleeve 11 over the frusta-conical portion 13 of the expanding nut 10 and into locking engagement with the wall of the opening. It is to be noted that in the lnal position of the sleeve in most circumstances the plate 25 comes into contact with the casing 14.

After having expanded the sleeve, it is sufficient only to rotate the structure with a resulting unthreading of the stem extension Z7 from the nut 10 which is then in position to receive the end of a securing bolt.

While I have disclosed my invention in accordance with a single specic structural embodiment thereof, such is to be considered as illustrative only, and not restrictive, the scope of the invention being deiined in the subjoined claims.

What I claim and desire to secure by U. S. Letters Patent is:

1. A tool for anchoring a nut into a wall opening by expanding a soft metal sleeve between the nut and the wall opening, said tool comprising a cylindrical wall engaging casing having a restricted opening in the inner end wall thereof, a generally T-shaped member having its upper head portion mounted on the other end wall of drical threaded portion thereof projecting through the restricted opening in the end wall of the cylindrical wall engaging casing, a reciprocal driving member comprising a bifurcated cylindrical portion mounted in the cylindrical wall'engaging casing, said driving member having a restricted lower cylindrical extension projecting through the restricted opening in the inner end wall and surrounding the lower cylindrical portion of the T-shapcd member, the bifurcated portion of the driving member straddling the upper portion of the IT-shaped member, said driving member having mounted onthe end of the bifurcated portion a hammer engaging plate.

2. The structure according to claim l, wherein the upper head p ortion of the T-shaped member is connected to the upper wall of the cylindrical wall engaging casing by stud bolts seated'i-n recesses at the ends of the head of the T-shapedA member.

Y 3,"1`he structutetaceording to c1aim..1,. wherein the connection between the upper head portion and the lower cylindrical threaded --portion of the-generally T-shaped member forms a shoulder and the base of the bifurcations in the driving member forms a stop, thereby limiting the upper movement of the driving member.

4. The structure according to claim l, wherein the restricted opening in the lower end wall of the wall engaging casing forms a shouIder-fengageable by a shoulder formed by the...eylind,ria 1 bifurcatd portions Lof the driving member and the restrcted'lower cylindrical extension projecting theiflom, veaidr,Shnllders forming a stop for the driving member.:

References Citdin the tile LQi` this patent UNITED STATES PATENTS 

